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Chicago circa 1901: "Casting pig iron, Iroquois smelter." 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.
But a great photo. Love the light coming through the openings at the left. Superb.
Called "Pig Iron" because the rough ingots were formed in small trenches leading off a large trench dug in the sand, looking like piglets nursing on their momma.
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